1540results about How to "Brightness adjustable" patented technology

An electronic display apparatus includes a substrate, pixels and light sensing parts. The substrate includes a display region and a peripheral region adjacent the display region, and the substrate includes a plurality of gate lines extended in a first direction and a plurality of data lines extended in a second direction that is substantially perpendicular to the first direction. The pixels defined by each of the data and gate lines are formed in the display region to display an image. The light sensing part is formed in the peripheral region, and the light sensing part senses an intensity of an ambient light. The light sensing part that senses an intensity of an ambient light is formed on the array substrate, so that a luminance of the display apparatus may be adjusted in accordance with the intensity of the ambient light.

An efficient power conversion circuit for driving a fluorescent lamp uses a pre-regulator to generate a regulated voltage with a relatively high level of ripple voltage. The regulated voltage can be varied to provide dimming of the fluorescent lamp. The regulated voltage is provided to a direct drive inverter. The direct drive inverter uses driving signals of fixed pulse widths to generate an output voltage to drive the fluorescent lamp. The output voltage has relatively long on-time durations so that the difference between the peak lamp current and the average lamp current is reduced, thus reducing a lamp current crest factor for improved lamp lighting efficiency.

An electronic display apparatus includes a substrate, pixels and light sensing parts. The substrate includes a display region and a peripheral region adjacent the display region, and the substrate includes a plurality of gate lines extended in a first direction and a plurality of data lines extended in a second direction that is substantially perpendicular to the first direction. The pixels defined by each of the data and gate lines are formed in the display region to display an image. The light sensing part is formed in the peripheral region, and the light sensing part senses an intensity of an ambient light. The light sensing part that senses an intensity of an ambient light is formed on the array substrate, so that a luminance of the display apparatus may be adjusted in accordance with the intensity of the ambient light.

An illumination control system includes lighting apparatuses connected to a communications line and a number of functional units of plural kinds functioning to detect information from ambient environments of the lighting apparatuses. Each lighting apparatus includes a lamp, an illumination circuit, a communication unit, a control unit, and a unit attaching part to which the functional unit is detachably attached. Each lighting apparatus belongs to one or more of plural groups corresponding to the functional units, the groups being operated based on information detected by the respective functional units. A functional unit having a detecting function corresponding to an operation of each group is attached to each unit attaching part of at least one lighting apparatus of each group, and each communication unit of the at least one lighting apparatus sends the control signal including information detected by the corresponding functional unit to another lighting apparatus in the same group.

A CPU 200 determines whether or not a picked up image that corresponds to image data is a backlit portrait image by analyzing the image data on a pixel-by-pixel basis, and if the picked up image that corresponds to the image data is determined to be a backlit portrait image, then executes a brightness correction for backlit portrait image. The CPU 200 obtains a tone curve that may have an output value of a predetermined value FV as an output value in response to an input value of a flesh-colored pixel average luminance value PV ave, which is an average luminance value of flesh-colored pixels of all pixels that constitute the image data. The CPU 200 applies the tone curve to the luminance of every pixel in the image data and thereby executes the brightness correction.

The technology provides various embodiments for controlling brightness of a see-through, near-eye mixed display device based on light intensity of what the user is gazing at. The opacity of the display can be altered, such that external light is reduced if the wearer is looking at a bright object. The wearer's pupil size may be determined and used to adjust the brightness used to display images, as well as the opacity of the display. A suitable balance between opacity and brightness used to display images may be determined that allows real and virtual objects to be seen clearly, while not causing damage or discomfort to the wearer's eyes.

The invention provides an LED atmosphere illumination control system, which adopts the standard DMX512 control protocol and a bus type network structure. A controller intensively controls all LED lamps. The system comprises an embedded light synchronous controller, an indoor atmosphere illumination controller, a general high-power LED drive, a transmission medium and the LED lamps. The system canperform scene mode control by network control mode, remote control mode, automatic control mode, manual control mode and various control modes; no less than nine scene modes are preset or can be freely set according to individual preference; digital diming can be achieved by an embedded program, and the illumination and the color tone of the light can be controlled precisely; and each lamp can beindependently controlled or can be controlled by networking. The system can ensure the evenness of the illumination effect while achieving the energy-saving illumination control and is widely applicable to local intensive illumination control of public places and families.

A light emitting element drive circuit and a display system able to simultaneously perform constant current control and PWM control and able to perform a stable adjustment of luminance over a wide dynamic range, including a constant voltage source having an output voltage adjustment unit able to be changed in output voltage according to a signal from the outside, a switch circuit connected to the cathode side of the LED and ON / OFF controlled in accordance with a PWM signal from the outside, a current detection unit for detecting the current flowing in the circuit, and a sample and hold circuit for maintaining the current input value from the current detection unit for a constant period, and the output voltage adjustment unit receives as input the output of the sample and hold circuit, that is, the current value when the switch circuit is ON, and adjusts the output of the constant voltage source so that this value becomes a previously determined set value, to thereby make the current flowing in the LED constant.

The invention provides a self-oscillation type high power LED constant-current drive circuit with low cost, high reliability and stability and high drive efficiency, the circuit comprises a rectifier and filter circuit, a switching circuit, a steady voltage constant current output circuit, a transformer, a self-oscillation type pulse width modulation signals generating circuit and a current feedback obstruction circuit, wherein the rectifier and filter circuit accesses commercial power into rectification, changes the commercial power into direct current, and then outputs commercial power to the switching circuit to switch in a self-oscillation type with high frequency, then high frequency voltage of the steady voltage constant current output circuit is transformed into direct voltage through the transformer to drive the LED, simultaneously sampling current signals produces jam signals through the current feedback obstruction circuit to control the switching circuit to work, the circuit does not adopt any driving chips and only uses fewer common individual devices to form a self-oscillation type structure to drive the switching circuit and to combine current feedbacks, which realizes constant current driving of the high power LED.

A photo sensor is disposed on the same substrate as that of a display area. External light sensed by the photo sensor is inputted into a luminance adjustment controller, and luminance necessary to maintain constant contrast is obtained. A correction value corresponding to the luminance to be adjusted is outputted as a white reference voltage or a value of a CV power source to be fed back to the display area. Constant contrast of the display area can be maintained even when surrounding light intensity varies. Moreover, an amount of electric current is adjusted according to the ambient light, leading to reduction in power consumption and extension of operating life.

An embodiment of the invention provides a pixel circuit drive method and drive device, relates to the technical field of display and is capable of solving the problem that when the gamma curves and the look-up table are utilized for adjusting the brightness, the number of memories is increased, and cost is increased accordingly. The drive method includes in the lighting process, acquiring the brightness information of a display image; determining the duty ratio of pulse signals according to the brightness information; inputting high level into a first voltage terminal, and allowing a first grid line to input the pulse signals with the duty ratio into the gate electrode of a first switch transistor.

The present invention discloses a video facial attaching picture effect processing method and generation system and belongs to the video effect field. The invention aims to make a user edit the effectof an attaching picture and adjust the position and size of the attaching picture by himself or herself. The method comprises the following steps that: feature positioning is performed on a face in avideo so as to obtain the facial feature points of the face; a selected image is imported and added on the face in the video so as to be adopted as an attaching picture, wherein the attaching pictureincludes an attaching picture image and attaching picture control points, the position parameters of the attaching picture control points are calculated according to the attaching picture control points and the facial feature points of the face which are corresponding to the attaching picture control points, and transformation processing is performed on the attaching picture through the positionparameters of the attaching picture control points, and the position parameters of the attaching picture control points can identify a relative position relationship between the attaching picture anda specified attaching picture area of the face in the video; and the attaching picture which has been subjected to the transformation processing is added onto the specified attaching picture area of the face in the video. The structure of the system includes a display module, a function module and a prompting module. With the video facial attaching picture effect processing method and generation system adopted, a user can edit the effect, position and size of an attaching picture by himself or herself.

A LED full-color lighting device contains a control unit, a light source unit, and a light display unit. The control unit relies on at least a potentiometer to apply various voltages to constant current sources, which in turn individually vary the current conducting through the red, green and blue LEDs of the light source unit, so as to deliver light of various colors. The colored light emitted from the light source unit can be easily and conveniently adjusted to fit a user's specific preference and mood. Colored patterns or textures can be formed on the light display unit so that the color of the light of the light source unit would mix with the colors of the patterns or textures to produce a visual effect as if some of the patterns or textures are changed.

A liquid crystal display (LCD) and method of adjusting brightness for the LCD are provided. The LCD includes a light emitter including a plurality of luminescent bodies which are divided into a predetermined number of partial areas, a backlight driver connected to the light emitter to control the brightness of each of the partial areas of the light emitter, and a controller for calculating a representative value for adjusting the brightness of each of the partial areas of the light emitter in accordance with an input image signal and outputting the representative value as a brightness adjustment signal for adjusting the brightness of each of the partial areas to the backlight driver. Thus, the brightness of each of partial areas of a backlight can be adjusted in accordance with the input image signal to improve a contrast ratio. Also, a representative value to be used for adjusting the brightness of each of the partial areas can be lowered by a predetermined ratio to effectively reduce power needed for lighting the backlight. Also, light loss and light gain occurring between neighboring partial areas can be compensated to improve the contrast ratio, and image artifacts can be reduced.

A mirror includes a frame holding therein back-to-back mirror plates having different magnification factors, e.g. 1× and 5×, each plate having a central reflective imaging area and a concentric light transmissive window. Continuously rotatable bushings supporting the frame between opposed arms of a yoke enable interchangeable orientation of 1× and 5× mirror plates in a forward-facing use position. A printed circuit board holding a circular ring of alternating yellow and white light emitting diodes (LED's) within the frame between the windows receives electrical power from a power supply in the base of the mirror via novel continuously rotatable two-conductor and single-conductor electrical connectors located in opposite sides of the frame and a coaxial cable and a single conductor wire disposed through opposed yoke-arm bushings, enabling energization of yellow, white, or both type LED's to thus illuminate a face or other object near the windows at three different selectable color temperatures.

A method and device are provided for adjusting brightness of an optical touch panel. The optical touch panel comprises a microprocessor, a display module including a back light source, and an optical position detection device including optical transmitting devices and optical receiving devices. The method comprises detecting, via the optical receiving devices, a current ambient light level on the display module. The method further comprises generating, via the optical receiving devices, a current ambient light level signal indicative of the current ambient light level and transmitting the current ambient light level signal to the microprocessor. Furthermore, the method comprises adjusting, via the microprocessor, brightness of the back light source based on the current ambient light level signal.

A display adjusting device adapted for adjusting display parameter(s) of a display unit includes a light sensing unit for sensing an environmental illumination associated with the display unit; an image capturing unit for capturing an image of a user in front of the display unit; and a controlling unit, electrically connected to the display unit, the light sensing unit and the image capturing unit, for selectively adjusting a first display brightness of the display unit to a second display brightness according to the environmental illumination, calculating a distance between eyes of the user and the display unit according to the image, and selectively adjusting the second display brightness to a third display brightness according to the distance.

An endoscope system has a light source system configured to emit illumination light on a target area, a scanner configured to periodically scan the illumination light over a target area at predetermined time intervals, and an imager configured to receive the illumination light reflected from the target area and to acquire in succession a sequence of image-pixel signals. Further, the endoscope system has a luminance detector that detects in succession a sequence of luminance data of the object image from the sequence of image-pixel signals; and a brightness adjuster that adjusts the brightness of an observed image on the basis of the sequence of luminance data. Then, the brightness adjuster adjusts an amount of illumination light in accordance with a scanning position of the illumination light.

A driving circuit of a light emitting diode (LED) includes a rectifier unit, a voltage-dividing circuit, a control unit, a voltage converter, a resistance and a capacitor. The rectifier unit rectifies an AC power to generate a first operation voltage. The voltage-dividing circuit generates a voltage-dividing signal. The control unit includes a regulating unit and a pulse width modulation (PWM) unit. An output terminal of the regulating unit is coupled to the PWM unit. The PWM unit outputs a PWM signal. The voltage converter adjusts a driving voltage and a driving current of the LED. The resistance is coupled between an output terminal of the regulating unit and a diode. The capacitor is coupled between a power input terminal of the regulating unit and a ground terminal. The PWM unit adjusts the PWM signal according to the voltage-dividing signal and a feedback signal output by the voltage converter.

The invention relates to an intelligent control system of a high power light emitting diode lighting fixture and essentially comprises a high power LED lighting source, an environmental monitoring sensor, a lighting fixture state monitoring sensor, a sensor driving circuit, an LED driving circuit, a microgram control unit, a circuit control unit and driving power supply; wherein, the environmental monitoring sensor and the lighting fixture state monitoring sensor are respectively connected with the input end of the microgram control unit which is connected with the circuit control unit which is respectively connected with the sensor driving circuit and the LED driving circuit which respectively drives the environmental monitoring sensor and the lighting fixture state monitoring sensor; the LED driving circuit is connected with the high power LED lighting source. The intelligent control system has the advantages that external situations can be timely detected through the monitoring system of the environment and lighting fixture states to control the on and off states or adjust the lighting brightness, which effectively reduces the energy consumption and prolongs the service life of the lighting fixture.

The embodiment of the invention relates to the field of electronic technologies, and discloses a flashlight power adjusting method. The method includes the steps that the distance between a terminal and a target object to be shot by a camera in the terminal is obtained through a distance measuring module; the power of a flashlight used in match with the camera in the terminal is determined according to the obtained distance; in the process that the camera shoots the target object, the flashlight is triggered to work according to the determined power of the flashlight. The embodiment of the invention further provides the terminal. By means of the flashlight power adjusting method and terminal, the power of the flashlight can be adjusted automatically according to the distance between the object to be shot and the shooting device, accordingly the brightness of the flashlight is adjusted, and thus energy is saved.

A current-controlling apparatus is suitable for controlling the current passing through a light emitting device string (LEDS), wherein an end of the LEDS is electrically connected to a first-voltage level. The current-controlling apparatus includes a current-adjusting unit and a control unit. The current-adjusting unit, electrically connected between a second-voltage level and another end of the LEDS, is used for detecting a current of the LEDS, producing a feedback signal hereby and controlling the impedance between the LEDS and the second voltage level according to a conductance-controlling signal and an impedance-controlling signal to control the current. The control unit is electrically connected to the current-adjusting unit for receiving a reference signal and the feedback signal, comparing the feedback signal with the reference signal to give a comparison result, performing a current compensation on the comparison result and converting the compensated comparison result into the conductance-controlling signal and the impedance-controlling signal.

A light array includes a major light, at least one minor light and a dimmer. The minor light is connected to the major light. The dimmer connected to the major light. The dimmer is operable for adjusting the luminance of light emitted from the major and minor lights.

The invention provides an LED light-dimming driving circuit comprising a short-circuit protection circuit, a ballast output circuit and a constant-current adjusting circuit. The LED light-dimming driving circuit is characterized by further comprising a driving switch circuit. The constant-current adjusting circuit comprises a single-chip microcomputer U1, a current sampling resistor R4, a light-dimming potentiometer W1 and a pressure parting resistor R2. A signal output pin of the single-chip microcomputer U1 outputs PWM (pulse width modulation) pulse signals, so that a driving triode Q2 and a switch triode Q1 are cut off or put through and lighting of LEDs can be controlled. The single-chip microcomputer U1 adjusts the PWM pulse signals output by the signal output pin according to feedback current. By the LED light-dimming driving circuit which is low in cost, simple in structure and efficient, the LED circuit is adjustable in luminance when at constant current state. Meanwhile, overheat protection, short-circuit protection and reverse-connection prevention function are added to the LED light-dimming driving circuit, so that stability, reliability and universality of the LED light-dimming driving circuit are improved.

The outdoor lighting fixture of the present invention provides a solar powered lighting fixture having one or more light emitting diodes whose luminance or brightness may be selectively adjusted by the user. The outdoor lighting system includes a dimmer switch mechanism in its electronic circuitry that allows a user to vary the luminance of the emitting diodes. In one embodiment, the dimmer switch mechanism modulates the pulse width of electricity provided to the one or more light emitting diodes. In another embodiment, the dimmer switch mechanism modulates the frequency of the one or more light emitting diodes. By adjusting the brightness of the light emitting diodes the operational time of the lighting fixture may also be modified.